Granted Patent
Utility
US 4,257,536 · App. 06/084,663
Laminate structure for collapsible dispensing container
Inventor:
Shaun K. Hilmar
Patented Case
View Patent ↗
Granted: Mar 24, 1981
Filed: Oct 15, 1979
Inventor
Shaun K. Hilmar
Assignee (at issue)
American Can Company
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.